순환기질환의공학회:학술대회논문집
- 2006.04a
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- Pages.28-36
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- 2006
X-ray PIV Measurements of Velocity Field of Blood Flows
- Lee, Sang-Joon (Department of Mechanical Engineering, Pohang University of Science and Technology) ;
- Kim, Guk-Bae (Department of Mechanical Engineering, Pohang University of Science and Technology)
- 이상준 (포항공대) ;
- Published : 2006.04.29
Abstract
The x-ray PIV method was improved for measuring quantitative velocity fields of real blood flows using a coherent synchrotron x-ray source. Without using any contrast media or seeding particles, this method can visualize flow pattern of blood by enhancing the phase-contrast and interference characteristics of blood cells based on a synchrotron x-ray imaging mechanism. The enhanced x-ray images were achieved by optimizing the sample-to-scintillator distance, the sample thickness, and hematocrit. The quantitative velocity fields of blood flows inside opaque tubes were obtained by applying a 2-frame PIV algorithm to the x-ray images of the blood flows. The measured velocity field data show typical features of blood flows such as the yield stress effect. The non-Newtonian flow characteristics of blood flows were analyzed using the x-ray PIV method and the experimental results were compared with hemodynamic models.